The purpose of this page is to define hydrodynamic forces, a commonly used term in floodplain management. To explore other common floodplain management terms access the NFIP Policy Index.
Hydrodynamic forces are imposed on an object, such as a building, by water flowing against and around it. Among the forces are positive frontal pressure against the structure, drag effect along the sides, and negative pressure in the downstream side. Hydrodynamic forces are one of the main causes of flood damage.Typical areas where hydrodynamic forces are of particular concern are along rivers and streams with high velocity floodwaters and coastal and other areas subject to wave forces.
- IS-9 Managing Floodplain Development Through The National Flood Insurance Program (NFIP)(Page 1-24)
- Free-Of-Obstruction Requirements (Technical Bulletin 5) (2008)
- Design and Construction Guidance for Breakaway Walls Below Elevated Coastal Buildings (FIA-TB-9)